Drinking straw



FIG. 1 is a perspective view of the drinking straw embodying the new design;

FIG. 2 is an enlarged left view thereof;

FIG. 3 is an enlarged right view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a front view thereof.

FIGS. 1-7 show the drinking straw includes a symbolic break along its length drawn in broken lines. The broken lines and the area between the break lines form no part of the claimed design. 

CLAIM The ornamental design for a drinking straw, as shown and described. 